1) Farming at least serves a purpose (food for humans).

2) The vast majority of people who eat meat do not support the farming and slaughter of dogs. They're tremendously emotionally intelligent, social creatures.

3) Sacrificing an animal for science may be morally justifiable if it saves human lives, but this was not one of those situations. A quote from one of the scientists assigned to Laika’s program:

> “The more time passes, the more I’m sorry about it. We shouldn’t have done it. We did not learn enough from the mission to justify the death of the dog.”